Information disclosure

<p>An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate <a href=“https://docs.microsoft.com/en-us/graph/api/resources/keycredential?view=graph-rest-1.0”>keyCredential</a>? on an Azure AD <a href=“https://docs.microsoft.com/en-us/azure/active-directory/develop/app-objects-and-service-principals”>Application or Service Principal</a> (which is not recommended). This vulnerability allows a user or service in the tenant with application read access to read the private key data that was added to the application.</p>
<p>Azure AD?addressed this vulnerability by preventing disclosure of any private key?values added?to the application.</p>
<p>Microsoft has identified services that could manifest this vulnerability, and steps that customers should take to be protected. Refer to the FAQ section for more information.</p>
<p>For more details on this issue, please refer to the <a href=“https://aka.ms/CVE-2021-42306-AAD”>MSRC Blog Entry</a>.</p>